<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<script src="../js/vue.min.js" ></script>
<body>
<h1>你好</h1>
<div id="app">
  <textarea v-model="message">

  </textarea>
  value={{message}}
</div>
<script>
  let vm=new Vue({
    el:'#app',
    data:{
      message:""
    }
  });

</script>

</body>
</html>